Material Processing Laboratory

M. Sasada

Masahiro Sasada
(Associate Professor)

Office: 8-514 Ext.: 3435 Laboratory: 8-452 Ext.: 3426


03/2002, Ph.D., Doshisha University

03/1998, M.S., Doshisha University

Research Field

Material Processing, Metal Forming, Machine Elements.

Research Overview

Advancing metal forming techniques and functional evaluation of forming products.

Research Subjects

  • 1. Pilot hole deformation in progressive die forming.
  • 2. Material flow in double-sided shearing.


Material flow in double-sided shearing

Shearing is widely used for many types of products because of its high productivity. However, the rollover, sheared surfaces, fractured surfaces, and burr of the cut surfaces must be reduced. It is important to clarify the relationship between the rollover shape and material flow to reduce the rollover. We have measured the material flow in double-sided shearing by using image processing. The material flow obtained by image processing is shown in Figure 1. We have investigated the formation of rollover based on the material flow obtained by image processing.

Progressive die forming

Feeding accuracy is important for progressive die forming. Generally, the sheet material is located by using a pilot pin and a pilot hole. We investigated the effect of punching on the deformation of the pilot hole experimentally.

Wave springs

We have performed numerical simulations by a general 3D finite element method (FEM) to clarify deformation characteristics (Figure 2). The effect of the shape of wave springs and deflection amplitude on fatigue life was discussed based on the results of the fatigue tests and numerical simulations.

  • 1) M. Sasada and A. Saito, “Effect of constraint of sheet material on successful range of blanking conditions and cut surface in push-back blanking”, Transaction of the JSME , vol. 81, No.830, DOI:10.1299/transjsme.15-00136, pp. 1-9 (2015).
  • 2) M. Sasada and T. Togashi, “Measurement of rollover in double-sided shearing using image processing and influence of clearance”, Procedia Engineering, vol. 81, pp. 1139–1144 (2014).
  • 3)M. Sasada, Y. Kamiichi, and T. Kikuchi, “Influence of the punch penetration depth in half punching on the cut edge after shaving”, Key Engineering Materials, vol. 622–623, pp. 1081–1086 (2014).
Affiliated Academic Organizations

The Japan Society of Mechanical Engineers, The Japan Society for Technology of Plasticity, The Japan Society for Precision Engineering, Society of Automotive Engineers of Japan.

Current members
◯ Assistant Professors: 1 ◯ Postgraduates: 3
◯ Undergraduates: 15